PIC32-MAXI-WEB

General purpose development board

USER’S MANUALDocument revision C, October 2015

Designed by OLIMEX Ltd, 2013

All boards produced by Olimex LTD are ROHS compliant

DISCLAIMER© 2015 Olimex Ltd. Olimex®, logo and combinations thereof, are registered trademarks of Olimex Ltd. Other productnames may be trademarks of others and the rights belong to their respective owners.

The information in this document is provided in connection with Olimex products. No license, express or impliedor otherwise, to any intellectual property right is granted by this document or in connection with the sale ofOlimex products.

This hardware design of PIC32-MAXI-WEB is neither public not open-source. Any copying of the product would resultin copyright infringement.

The software is released under the terms that are detailed in the agreement page, that pops-up when you attempt todownload a demo software archive.

It is possible that the pictures in this manual differ from the latest revision of the board.

The product described in this document is subject to continuous development and improvements. All particulars of theproduct and its use contained in this document are given by OLIMEX in good faith. However all warranties implied orexpressed including but not limited to implied warranties of merchantability or fitness for purpose are excluded. Thisdocument is intended only to assist the reader in the use of the product. OLIMEX Ltd. shall not be liable for any loss ordamage arising from the use of any information in this document or any error or omission in such information or anyincorrect use of the product.

This evaluation board/kit is intended for use for engineering development, demonstration, or evaluation purposes onlyand is not considered by OLIMEX to be a finished end-product fit for general consumer use. Persons handling theproduct must have electronics training and observe good engineering practice standards. As such, the goods beingprovided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-relatedprotective considerations, including product safety and environmental measures typically found in end products thatincorporate such semiconductor components or circuit boards.

Olimex currently deals with a variety of customers for products, and therefore our arrangement with the user is notexclusive. Olimex assumes no liability for applications assistance, customer product design, software performance, orinfringement of patents or services described herein.

THERE IS NO WARRANTY FOR THE DESIGN MATERIALS AND THE COMPONENTS USED TO CREATE PIC32-MAXI-WEB. THEY ARE CONSIDERED SUITABLE ONLY FOR PIC32-MAXI-WEB.

Page 2 of 22

Table of ContentsDISCLAIMER ............................................................................................................. 21. INTRODUCTION ................................................................................................... 4

1.1 BOARD FEATURES ............................................................................................................... 41.2 ELECTROSTATIC WARNING: ............................................................................................ 4

1.3 BOARD USE REQUIREMENTS: ......................................................................................... 41.4 BOARD LAYOUT ................................................................................................................... 5

2. MICROCONTROLLER DETAILS ...................................................................... 62.1 FEATURES .............................................................................................................................. 62.2 BLOCK DIAGRAM ................................................................................................................ 8

2.3 MEMORY MAP ...................................................................................................................... 9

3 BOARD SCHEMATIC AND DIMENSIONS ...................................................... 103.1 SCHEMATIC ......................................................................................................................... 10

3.2 PHYSICAL DIMENSIONS .................................................................................................. 12

4. CONTROL CIRCUITRY ..................................................................................... 134.1 POWER SUPPLY CIRCUIT ................................................................................................ 13

4.2 RESET CIRCUIT .................................................................................................................. 134.3 CLOCK CIRCUIT ................................................................................................................ 13

5. JUMPERS, CONNECTORS AND INTERFACES ............................................ 145.1 JUMPER DESCRIPTION .................................................................................................... 145.2 INPUT/OUTPUT ................................................................................................................... 14

5.3 EXTERNAL CONNECTOR DESCRIPTION .................................................................... 155.3.1 PWR_JACK .................................................................................................................................................. 155.3.2 ICSP CONNECTOR .................................................................................................................................... 155.3.3 RS232/UART ................................................................................................................................................. 165.3.6 CAN1 AND CAN2 ........................................................................................................................................ 175.3.7 JTAG .............................................................................................................................................................. 175.3.8 UEXT1 ........................................................................................................................................................... 185.3.9 UEXT2 ........................................................................................................................................................... 185.3.10 MICROSD CARD ...................................................................................................................................... 19

6. AVAILABLE DEMO SOFTWARE ...................................................................... 207. REVISION AND ORDERING INFORMATION .............................................. 21

7.1 DOCUMENT REVISION ..................................................................................................... 21

7.2 BOARD REVISION .............................................................................................................. 21

8. WARRANTY AND SUPPORT ............................................................................. 22

Page 3 of 22

1. INTRODUCTION

This board features a PIC32 processor with embedded 100Mbit Ethernet module which allows you to easily develop network applications. It has everything you would normally need for such applications: power relays which you can command through a web interface, a large 240×320 TFT LCD with touchscreen support (that allows the development of complex graphical user interface applications), digital opto-isolated inputs, trimmer potentiometer, accelerometer with integrated temperature sensor, two CAN interface channels, RS232 interface, USB On-The-Go and micro SD card slot to store large amounts of data. With this board you can easily automate your home and then control and monitor it from any point in the world via Internet. An extension connector is available so you can connect custom made hardware to the board. The PIC32MX795F512L has 512K Flash memory (plus an additional 12 KB of Boot Flash).

1.1 BOARD FEATURES

The notable board features are listed below:

PIC32MX795F512L high-performance, USB, CAN and Ethernet 32-bit Flash microcontroller

TFT LCD 320×240 65k colors with resistive touchscreen Debug interface – JTAG and ICSP RESET circuit Reset button Two opto-isolated digital inputs with indicator LEDs Two CAN interfaces 100Mbit Ethernet interface Two UEXT connectors to connect to other Olimex boards Accelerometer with integrated temperature sensor MicroSD card holder Two relays 10A/250VAC with indicator LEDs USB On-The-Go RS232 interface Trimmer connected to analog input Three user LEDs Stand-alone power LED Three user buttons 3.3V voltage regulator Dimensions (140×100) mm (5.51×3.94)"

1.2 ELECTROSTATIC WARNING:

The PIC32-MAXI-WEB board is shipped in protective anti-static packaging. The board must not besubject to high electrostatic potentials. General practice for working with static sensitive devices should be applied when working with this board.

1.3 BOARD USE REQUIREMENTS:

Cables: the board needs external power supply cable and mini ICSP cable (connected to the respective debugger) in order to test basic functionality. Depending on the peripherals used you mayalso need and Ethernet RJ45 terminated cable, 9pin RS232 cable, miniUSB cable.

Page 4 of 22

Hardware: The board requires +12V regulated power supply.

!!! Please note that the PIC32 processor on this board is not supported by the once famous ICD2 programmer/debugger and derivatives. You would need a newer debugger/programmer. Please ensure your programmer/debugger is compatible with PIC32 microcontrollers.

1.4 BOARD LAYOUT

Page 5 of 22

2. MICROCONTROLLER DETAILS

Some of the details about the main microcontroller in PIC32-MAXI-WEB (PIC32MX795F512L) microcontroller are mentioned in this chapter. It is highly recommended to refer to the original datasheet which might be downloaded from the official Microchip web-side.

2.1 FEATURES

PIC32-MAXI-WEB board uses MCU PIC32MX795F512L from Microchip Technology that packs the following features:

High-Performance 32-bit RISC CPU: MIPS32® M4K® 32-bit core with 5-stage pipeline 80 MHz maximum frequency 1.56 DMIPS/MHz (Dhrystone 2.1) performance at zero Wait state Flash access Single-cycle multiply and high-performance divide unit MIPS16e™ mode for up to 40% smaller code size Two sets of 32 core register files (32-bit) to reduce interrupt latency Prefetch Cache module to speed execution from Flash

Microcontroller Features: Operating voltage range of 2.3V to 3.6V 512K Flash memory (plus an additional 12 KB of Boot Flash) 128K SRAM memory Pin-compatible with most PIC24/dsPIC® DSC devices Multiple power management modes Multiple interrupt vectors with individually programmable priority Fail-Safe Clock Monitor mode Configurable Watchdog Timer with on-chip Low-Power RC oscillator for reliable operation

Peripheral Features: Atomic SET, CLEAR and INVERT operation on select peripheral registers 8-channels of hardware DMA with automatic data size detection USB 2.0-compliant full-speed device and On-The-Go (OTG) controller:

Dedicated DMA channels 10/100 Mbps Ethernet MAC with MII and RMII interface:

Dedicated DMA channels CAN module:

2.0B Active with DeviceNet™ addressing support Dedicated DMA channels

3 MHz to 25 MHz crystal oscillator Internal 8 MHz and 32 kHz oscillators Six UART modules with:

RS-232, RS-485 and LIN 1.2 support IrDA® with on-chip hardware encoder and decoder

Four SPI modules Five I2C™ modules Separate PLLs for CPU and USB clocks Parallel Master and Slave Port (PMP/PSP) with 8-bit and 16-bit data, and up to 16 address

Page 6 of 22

lines Hardware Real-Time Clock and Calendar (RTCC) Five 16-bit Timers/Counters (two 16-bit pairs combine to create two 32-bit timers) Five Capture inputs Five Compare/PWM outputs Five external interrupt pins High-speed I/O pins capable of toggling at up to 80 MHz High-current sink/source (18 mA/18 mA) on all I/O pins Configurable open-drain output on digital I/O pins

Debug Features: Two programming and debugging Interfaces:

2-wire interface with unintrusive access and real-time data exchange with application 4-wire MIPS® standard enhanced Joint Test Action Group (JTAG) interface

Unintrusive hardware-based instruction trace IEEE Standard 1149.2 compatible (JTAG) boundary scan

Analog Features: 16-channel, 10-bit Analog-to-Digital Converter:

1 Msps conversion rate Conversion available during Sleep and Idle

Two Analog Comparators 5V tolerant input pins (digital pins only)

Page 7 of 22

2.2 BLOCK DIAGRAM

A block diagram with main functional parts of the microcontroller as seen in the official Microchip documentation.

Page 8 of 22

2.3 MEMORY MAP

The microcontroller's memory regions as seen in the official Microchip documentation.

Page 9 of 22

3 BOARD SCHEMATIC AND DIMENSIONS

In this chapter you may find information about the schematics describing logically and physically PIC32-MAXI-WEB.

3.1 SCHEMATIC

The schematic of PIC32-MAXI-WEB is available for reference on the next page.

Only the board schematic is available to the customer. It is available only as a stand-alone PDF document and as a reference image on. The board design files are kept private.

If you are looking for a schematic of an older revision of the board and it isn't available at our web site you may request it by the support e-mail.

Page 10 of 22

PIC32-MAXI-WEB, board revision A:

Page 11 of 22

12VDC

DEBUG INTERFACE:

POWER SUPPLY

RS232

USER LEDS

RESET CIRCUIT

CUT!!!NC

NC

USER BUTTONS

TRIMMER

USB_OTG

TFT-LCD

CAN

See LPC2378-STK_Rev.C

LAN UEXT1

UEXT2

SD/MMCACCELEROMETER

RELAYS

DIGITAL INs

3.3V

3.3VA1 23.3VA_E

CLOSE

3.3V_ECLOSE

AGND1 2AGND_E

CLOSE

AN_TR

10k

BUT1 BUT2 BUT3

C1100nF

C2100nF

C3100nF

C4100nF

C5100nF

C6100nF

C7 39pF

C8 39pF

C9 27pF

C10 27pF

C11100nF

C12

10uF/6.3V/0805

C13 100nF

+C14 10uF/6.3V/0805

C15 100nF

C16100nF

C20

10uF/6.3V/0805

C21

100nF C22100nF

+C23

10uF/6.3V/0805

C25C26

100nFC27

100nF

C2847uF/6.3V/TANT

C29100nF

C30

C31100nF

C32

100nF

C33

100nF

C34

NA(100nF)

C35

NA(100nF)

C36

NA(100nF)

C37

100nF

C38

C39

C40C41

C45NA(10nF)

C46

4.7nF

C51100nF

C52

10uF/6.3V/0805

C53100nF

C54

100nF

C55100nF

C56

100nF

C57100nF

C58

2.2uF

C59

100nF

C60

100nF

C61

100nF

C62

100nF

C63

10uF/6.3V

C64

47uF/6.3V/TANT

123

CAN1

TB3-3.5mm

12CAN1_D

OPEN

12

3

CAN2

TB3-3.5mm

12CAN2_D

OPEN

VDD

VSSOUT

E/D1

3

4

2

CD1

6NC2-50MHz

CTS

D1

1N4148

D2

1N4148

D31N5819(SS14)

D41N4148

D51N5819(SS14)

D61N5819(SS14)

D71N4148

D81N4148

FB1FB0805/600R/200mA(201209-601)

FB2FB0805/600R/200mA(201209-601)

FB4

FB0805/600R/200mA(201209-601)

FET1IRLML6402

GND

12

345

6

ICSP

WF6S

TB2-3.5mm

IN1

1

2

TB2-3.5mm

IN2

1

2

1 23 45 6

7 89 10

11 1213 14

JTAG

BH14S(PIN<12>-CUT\!)

L1

15uH/DBS135

L2CL470nH/0805/1.76R/250mA

7575

7575

1nF/2kV

1:1

1:1

1452

3786

GREEN

YELLOW

AGAG

AYAY

COM3

KGKG

KYKY

NC6

RD+7

RD-8

TD+1

TD-2

LAN

RJLBC-060TC1

LED1 LED2 LED3

LED_IN1GYX-SD-TC0805SURK(RED)

LED_IN2GYX-SD-TC0805SURK(RED)

OPT1

H11A817SMD

1

2

4

3

OPT2

H11A817SMD

1

2

4

3

+5V

2.5V

+5V

+12V

+12V+12V

+5V

+5V

PWRPWR_JACK

YDJ-1134

Q1

Q8.000MHz/20pF/HC-49SM(SMD)

GND

Q2QCT32768(2x6)/6pF

R61.5K/1%

R74.99k/1%

R8 10k

R910k

R10 1k

R16 100k

R22 4.7k

R23 330RR24 330RR25 330RR26 NA

R27 1k

R28 4.7k

0RR29 0R(NA)R30 NAR31 NA

R32 NA

R33 4.7k

0RR34 0R(NA)R35 NAR36 NA

R37 10k

0RR38 0R(NA)R39 NAR40 4.7k

0RR41 0R(NA)R42 NAR43 4.7k

R44 10k

R45 1MR46 10k

R47 100kR48 100kR49 100k

R50 1k

0R

R510R(NA)

R521k

R531k

R54 330R

R5510k

R56330R

R57NA

R58NA

R59NA

R60100k

R61100k

0R

R62

0R(NA)R63100k

R641k

R65330R

R66NA(100R)

R6710k

R68330R

R69NA(100R)

R7010k

R71330R

R72NA(100R)

R7310k

R74

R75

R76

R77

4.99k/1%

R78

15k/1%R79 4.99k/1%

R80

150k

R81

4.7k

R83330R

R84330R

R85330R

R86

330R

R87330R

R88NA

R8910kR9010k

0RR910R(NA)

R9410k

R95120R

0RR960R(NA)

R99 10k

R100120R

R101

4.7k

R102330R

R103330R

R104

4.7k

R105330R

1

234

5

6

REL

HD-515R_6P

RAS-12-15

REL1REL1

RAS-12-15

REL2

REL2

RESET

T1107A(6x3.8x2.5mm)

1

23

4

5

67

8

9

G1

G2

RS232

DB9-F

RTS

CD/DAT3/CS2

CLK/SCLK5

CMD/DI3

DAT0/DO7

DAT1/RES8

DAT2/RES1

VDD4

VSS6

SD/MMCMICRO

T1DTC114YKA

10k T2DTC114YKA

10k

T3DTC114YKA

10k

TFT

FS-K320QVB-V1

#CS4

#RD7

#RESET8

#WR6

DB09DB110DB211DB312DB413DB514DB615DB716DB817DB918DB1019DB1120DB1221DB1322DB1423DB1524

GND1

GND25

GND37

LEDA35

LEDA36

LEDK130

LEDK231

LEDK332

LEDK433

LEDK534

RS5

VCC2

VCC3

XL27

XR29

YD26

YU28

#MCLR13

#SS1/IC2/RD969

AC1RX/#SS3A/U3BRX/U3ACTS/RF1240

AC1TX/SCK3A/U3BTX/#U3ARTS/RF1339

AERXD0/INT1/RE818

AERXD1/INT2/RE919

AERXERR/RG151

AETXCLK/SCL1/INT3/RA1466

AETXD0/#SS1A/U1BRX/#U1ACTS/CN20/RD1447AETXD1/SCK1A/U1BTX/#U1ARTS/CN21/RD1548

AETXEN/SDA1/INT4/RA1567

AN2/C2IN-/CN4/RB223AN3/C2IN+/CN5/RB322AN4/C1IN-/CN6/RB421AN5/C1IN+/VBUSON/CN7/RB520

AN8/C1OUT/RB832AN9/C2OUT/RB933AN10/CVREFOUT/PMA13/RB1034AN11/ERXERR/AETXERR/PMA12/RB1135AN12/ERXD0/AECRS/PMA11/RB1241AN13/ERXD1/AECOL/PMA10/RB1342AN14/ERXD2/AETXD3/PMALH/PMA1/RB1443AN15/ERXD3/AETXD2/OCFB/PMALL/PMA0/CN12/RB1544

AVDD30

AVSS31

C1RX/ETXD1/PMD11/RF087

C1TX/ETXD0/PMD10/RF188

C2RX/PMD8/RG090

C2TX/ETXERR/PMD9/RG189

D+/RG257

D-/RG356

ECOL/SCK2A/U2BTX/#U2ARTS/PMA5/CN8/RG610

ECRS/SDA2A/SDI2A/U2ARX/PMA4/CN9/RG711

EMDC/IC4/PMCS1/PMA14/RD1171

ERXCLK/#SS2A/U2BRX/#U2ACTS/PMA2/CN11/RG914

ERXDV/SCL2A/SDO2A/U2ATX/PMA3/CN10/RG812

ETXCLK/PMD15/CN16/RD784

ETXD2/IC5/PMD12/RD1279ETXD3/PMD13/CN19/RD1380

ETXEN/PMD14/CN15/RD683

OC2/RD176OC3/RD277OC4/RD378

OC5/PMWR/CN13/RD481

OSC1/CLKI/RC1263OSC2/CLKO/RC1564

PGEC1/AN1/CN3/RB124

PGEC2/AN6/OCFA/RB626

PGED1/AN0/CN2/RB025

PGED2/AN7/RB727

PMD0/RE093PMD1/RE194PMD2/RE298PMD3/RE399

PMD4/RE4100

PMD5/RE53

PMD6/RE64

PMD7/RE75

PMRD/CN14/RD582

RTCC/EMDIO/IC1/RD868

SCK1/IC3/PMCS2/PMA15/RD1070

SCL1A/SDO1A/U1ATX/RF853

SCL2/RA258

SCL3A/SDO3A/U3ATX/PMA8/CN18/RF550

SDA1A/SDI1A/U1ARX/RF252

SDA2/RA359

SDA3A/SDI3A/U3ARX/PMA9/CN17/RF449

SDO1/OC1/INT0/RD072

SOSCI/CN1/RC1373

SOSCO/T1CK/CN0/RC1474

T2CK/RC16T3CK/AC2TX/RC27T4CK/AC2RX/RC38T5CK/SDI1/RC49

TCK/RA138

TDI/RA460TDO/RA561

TMS/RA017

TRCLK/RA691

TRD0/RG1397

TRD1/RG1296

TRD2/RG1495

TRD3/RA792

USBID/RF351

VBUS54

VCAP/VDDCORE85

VDD2

VDD16

VDD37

VDD46

VDD62

VDD86

VREF+/CVREF+/AERXD3/PMA6/RA1029

VREF-/CVREF-/AERXD2/PMA7/RA928VSS

15

VSS36

VSS45

VSS65

VSS75

VUSB55

U1

PIC32MX795F512L-80I/PT

FXSD/FXEN34

GND18

GND212

GND435

GND536

INT/PHYAD025

LED0/TEST26

LED1/SPD100/NFEF27

LED2/DUPLEX28

LED3/NWAYEN29

MDC2

MDIO1

PD#30

RX+33RX-32

RXC10

RXD0/PHYAD46

RXD1/PHYAD35

RXD2/PHYAD24

RXD3/PHYAD13

RXDV/CRSDV/PCS_LPBK9

RXER/ISO11

VDDIO17

VDDRX31

U2KS8721BLMM

U3

SMB380,(QFN10)

CSB5GND

3

INT 4

NC11

NC210

SCK6

SDI/SDA8

SDO7

VDD2

VDDIO9

GND

VCCRESET1 2

U4NA(MCP130T)

C1+1

C1-3

C2+4

C2-5

R1IN13R1OUT

12R2IN8

R2OUT9

T1IN11T1OUT14

T2IN10T2OUT7

V+2

V-6

U5

ST3232(SO16)

GND VCC15 16

U5PWR

#ENA1

#ENB4

FLAG_A2

FLAG_B3GND6

IN7

OUT_A8

OUT_B5

U6

LM3526M-L(SO8)

CANH7CANL6

RS8

RXD4

TXD1

VDD3

VREF5

VSS2

U7

MCP2551

CANH7CANL6

RS8

RXD4

TXD1

VDD3

VREF5

VSS2

U8

MCP2551

BH10S

UEXT1

1 23 45 6

7 89 10

BH10S

UEXT2

1 23 45 6

7 89 10

D+

D-

GNDID

VBUS

USB_OTG

MICRO_AB

3.3V

3.3V

3.3VA

3.3V3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V3.3V

3.3V

AGNDAGND AGND

3.3VA

3.3V3.3V 3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V

3.3V3.3V

3.3V

3.3V3.3V

3.3V

3.3V

3.3V

3.3VA

AGND

AGND

3.3V

3.3V3.3V

VDD_ECLOSE

VR1

BD9778HFP

EN/SYNC7

FB 3GND

4

INV 5

RT6 SW 2

VIN1

ADJ/GND

IN OUT

VR1(3.3V)LM1117IMPX-ADJ

+5V_VBUS +5V_VBUS

+5V_VBUS

/TFT_CS

/TFT_CS

/TFT_RST

/TFT_RST

AC1RX

AC1RX

AC1RX

AC1TX/SCK3A

AC1TX/SCK3A

AC1TX/SCK3A

AC1TX/SCK3A

AC2RX

AC2RX

AC2TX

AC2TX

ACC_INT

ACC_INT

AERXD0

AERXD0

AERXD1

AERXD1

AERXERR

AERXERR

AETXD0AETXD1

AETXEN

AETXEN

CS_MMC

CS_MMC

EMDC

EMDC

EMDIO

EMDIO

ERXDV

ERXDV

IN1

IN1

IN2

IN2

LED1

LED1

LED2

LED2

LED3

LED3

MISO1

MISO1

MISO3A

MISO3A

MISO3A

MISO3A

MOSI1

MOSI1

MOSI3A

MOSI3A

MOSI3A

MOSI3A

PC_CD PC_CTS

PC_CTS PC_RTSPC_RTS

PC_RXD

PC_RXD

PC_TXD PC_TXD

PGEC2

PGEC2

PGED2

PGED2

PHY_IRQ

PHY_IRQ

PHY_IRQ

PHY_REFCLK

PHY_REFCLK

PHY_RSTN

PHY_RSTN

PHY_VDD_PLL

PMD0

PMD0

PMD1

PMD1

PMD2

PMD2

PMD3

PMD3

PMD4

PMD4

PMD5

PMD5

PMD6

PMD6

PMD7

PMD7

PMD8

PMD8

PMD9

PMD9PMD10

PMD10

PMD11

PMD11 PMD12

PMD12

PMD13

PMD13

PMD13

PMD14

PMD14

PMD14 PMD15

PMD15

PMD15

PMRD

PMRD

PMWR

PMWR

RELAY1

RELAY1

RELAY2

RELAY2

RSTN

RSTN

RSTN

RSTN

RXD1

RXD1

RXD1

RXD1_INT

RXD1_INT

SCK1

SCK1

SCL1

SCL2

SCL2

SCL2

SDA1

SDA2

SDA2

SDA2

SW_SCL1

SW_SCL1

SW_SDA1

SW_SDA1

SW_U2RX

SW_U2RX

SW_U2TX

SW_U2TX

TCK

TCK

TDI

TDI

TDO

TDO

TFT_LIGHT

TFT_LIGHT

TFT_RS

TFT_RS

TMS

TMS

TRIM

TRIM

TXD1

TXD1

TXD1

U2RXU2TX

UEXT1_CS

UEXT1_CS

UEXT2_CS

UEXT2_CS

USBID

USBID USBIDUSB_D+USB_D+

USB_D+USB_D-

USB_D-USB_D-

USB_FAULT

USB_FAULT

VBUSON

VBUSON

XL

XL

XR

XR

YD

YD

YU

YU

3.2 PHYSICAL DIMENSIONS

Note that all dimensions are in millimeters.

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4. CONTROL CIRCUITRY

4.1 POWER SUPPLY CIRCUIT

PIC32-MAXI-WEB can be power only from power connector PWR_JACK, where only 12 VDC external voltage source has to be applied.

The board power consumption is about 300mA with all peripherals and MCU running at full speed, relays and LEDs on and established Ethernet connection.

4.2 RESET CIRCUIT

PIC32-MAXI-WEB reset circuit is made of D4 (1N4148), RC group R55 – 10k and C31 – 100nF. Serial resistor R56 – 330Ω is used to prevent fast C31 charge and discharge when PIC32MX795F512L is being programmed.

Manual reset is possible by the RESET button.

4.3 CLOCK CIRCUIT

Quartz crystal Q1 8MHz is connected to PIC32MX795F512L pins 63 (OSC1/CLKI/RC12) and 64 (OSC2/CLKO/RC15).

Quartz crystal Q2 32.768 KHz is connected to PIC32MX795F512L pins 73 (SOSCI/CN1/RC13) and 74 (SOSCO/T1CK/CN0/RC14).

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5. JUMPERS, CONNECTORS AND INTERFACES

In this chapter you will find the description of the jumpers and what signals might be found on the different connectors.

5.1 JUMPER DESCRIPTION

3.3V_E – Enables 3.3V supply for PIC32MX795F512L and all other devices.Default state closed (shorted).

3.3VA_E – Enables 3.3V positive supply for analog modules.Default state is closed (shorted).

VDD_E – Enables PIC32MX795F512L's 3.3V power supply.Default state is closed (shorted).

AGND_E – Enables the analog ground.Default state is closed (shorted).

CAN1_T – This jumper assures correct work of the CAN1. At each end of the bus it should be closed. This means that if you have only two devices with CAN, the jumpers of

both devices should be closed. If you have more than two devices, only the two end devices should be closed.Default state is closed (shorted).

CAN1_D – CAN Disable. If this jumper is closed, the CAN1 is disabled.Default state is open (not shorted).

CAN2_T – This jumper assures correct work of the CAN2. At each end of the bus it should be closed. This means that if you have only two devices with CAN, the jumpers of

both devices should be closed. If you have more than two devices, only the two end devices should be closed.Default state is closed (shorted).

CAN2_D – CAN Disable. If this jumper is closed, the CAN2 is disabled.Default state is open (not shorted).

5.2 INPUT/OUTPUT

User button with name BUT1 – connected to PIC32MX795F512L pin 83 (ETXEN/PMD14/CN15/RD6).

User button with name BUT2 – connected to PIC32MX795F512L pin 84 (ETXCLK/PMD15/CN16/RD7).

User button with name BUT3 – connected to PIC32MX795F512L pin 80 (ETXD3/PMD13/CN19/RD13).

Reset button with name RESET – connected to PIC32MX460F512L pin 13 (#MCLR).

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One analog trimmer with name AN_TR – connected to PIC32MX795F512L pin 32 (AN8/C1OUT/RB8).

Status Led (yellow) with name LED1 – connected to PIC32MX795F512L pin 34 (AN10/CVREFOUT/PMA13/RB10).

Status Led (green) with name LED2 – connected to PIC32MX795F512L pin 76 (OC2/RD1).Status Led (red) with name LED3 – connected to PIC32MX795F512L pin 77 (OC3/RD2).

Two opto-isolated digital inputs IN1 and IN2.

Two red LEDs – LED_IN1 and LED_IN2 for every digital input.

Two red LEDs – LED_R1, LED_R2 – for the relays.

Power supply red LED with name PWR – indicates that 3.3V power supply is available.

TFT LCD Display – FS-K320QVB-V1

5.3 EXTERNAL CONNECTOR DESCRIPTION

5.3.1 PWR_JACK

The power jack is used to power the board. Exactly 12V of voltage should be provided. The current required depends on the peripherals used but generally your source should be capable to provide at least 350mA.

The power jack is like the ones we use on all Olimex boards → YDJ-1134 (2mm in diameter front hole).

If your power adapter doesn't havethe same jack you would need toadapt it. Make sure that youcarefully follow the pin assignment.

Pin # Signal name

1 Power input2 GND

5.3.2 ICSP CONNECTOR

The ICSP connector is used for serial programming. It is the place where most common PIC32-compatible programmers and debuggers are connected. The pins have 0.1'' step. If your programmer/debugger has only the smaller 0.05'' connector you might need an adapter or you should use jumper wires.

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Pin # Signal name

1 RSTN2 3.3V3 GND4 PGED25 PGEC26 NC

PGED2 conducts I/O operations for the “Program Data” signal. Serial data for programming.PGEC2 serves only as input for the “Program Clock” signal. Clock used for transferring the serial data (output from ICSP, input for the MCU).

5.3.3 RS232/UART

Pin # Signal name

1 PC_CD2 PC_RXD3 PC_TXD4 NC5 GND6 NC7 PC_RTS8 PC_CTS9 NC

TXD is an output. It is the “Transmit Data” signal which is the asynchronous serial data output (RS232) for the shift register on the UART controller.RXD is an input. It is the “Receive Data” signal which is the asynchronous serial data input (RS232) for the shift register on the UART controller.

The demo software uses RS232 so it would display your IP address on a PC terminal program (at 115200 baud) when the board is connected to a PC and has a valid Ethernet source connected.

5.3.4 USB_OTG

Pin # Signal name

1 +5V_VBUS2 USB_D-3 USB_D+4 USBID5 GND

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5.3.5 ETHERNET

Pin # Signal name(chip side) Pin # Signal name(chip side)1 TX+ 5 Not Connected (NC)2 TX- 6 Not Connected (NC)3 VCC/2 (2.5V) 7 RX+4 Not Connected (NC) 8 RX-

LED Color UsageLeft Yellow 100MBits/s (Half/Full duplex)Right Green Activity

5.3.6 CAN1 AND CAN2

Controller Area Network(CAN) is a standard designed to allow microcontrollers and devices to communicate with each other within a vehicle without a host computer. Both CAN1 and CAN2 connectors follow the same layout.

Pin # Signal

1 GND2 CANL3 CANH

5.3.7 JTAG

The microcontroller has EJTAG support. The EJTAG signals are provided on the 14-pin JTAG connector.

Pin # Signal name Pin # Signal name

1 NC 8 GND2 GND 9 TCK3 TDI 10 GND4 GND 11 RSTN5 TDO 12 CUT6 GND 13 NC7 TMS 14 3.3v

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5.3.8 UEXT1

The 10-pin UEXT connectors are typically mounted on Olimex boards. They pack three common interfaces in a single connector – UART, I2C and SPI. You can use the UEXT connector to access this interfaces easier (via jumper wires, for example).

You can also connect expansion modules to the UEXT connectors. More on UEXT might be found here: https://www.olimex.com/Products/Modules/UEXT/

Pin # Signal name

1 3.3 V2 GND3 TXD14 RXD15 SCL16 SDA17 MISO18 MOSI19 SCK110 UEXT1_CS

5.3.9 UEXT2

UEXT2 features other UART, I2C and SPI signals. However there is multiplexing on some of the lines which might cause problems if you are trying to use the line on both places.

The I2C data lines (SCL2, SDA2) are used for the built-in the board accelerometer. The SPI clock signal AC1TX/SCK3A is used by the SD card connector.

Pin # Signal name

1 3.3 V2 GND3 U2TX4 U2RX5 SCL26 SDA27 MISO3A8 MOSI3A9 AC1TX/SCK3A10 UEXT2_CS

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5.3.10 MICROSD CARD

Pin # Signal name

1 MCIDAT22 CS_MMC3 MOSI3A4 VDD (3.3 V)5 AC1TX/SCK3A6 GND7 MISO3A8 MCIDAT19 Not Connected10 Not Connected11 Not Connected12 Not Connected

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6. AVAILABLE DEMO SOFTWARE

To compile the demo you would need the following tools: MPLAB IDE v8.91 or MPLABX 1.80, Compiler: XC32 v1.21.

The demo demonstrates the functionality of the various peripherals of the board including user input, serial communication, the implementation of Graphical User Interface (GUI) and betwork connectivity

The demo is built upon the Microchip Solutions library (released on 22 august 2012) including freely distributed support libraries:

- Microchip Graphics Library v3.06- Microchip TCP/IP Stack Library v5.42- Microchip MDD File System Library 1.4.0 (FAT, FAT32 file systems)- Microchip USB support source files

FreeRTOS was used to make all tasks run virtually simultaneously. FreeRTOS is a freely distributedRTOS with excellent support and online documentation. Version used is v7.3.0. MPLAB has support for FreeRTOS (Tools/RTOS viewer).

You could find demo software for PIC32-MAXI-WEB board at the board's web page. It is recommended to refer to the “README.txt” file inside the demo archive.

Direct link to PIC32-MAXI-WEB's web-page: https://www.olimex.com/Products/PIC/Development/PIC32-MAXI-WEB/

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7. REVISION AND ORDERING INFORMATION

PIC32-MAXI-WEB – fully assembled and tested

How to purchase?

You can purchase directly from our online shop or from any of our distributors. Note that usually it is faster and cheaper to purchase Olimex products from our distributors. List of confirmed Olimex LTD distributors and resellers: https://www.olimex.com/Distributors.

Please visit https://www.olimex.com/ for more info.

7.1 DOCUMENT REVISION

Revision, date Changes Modified page

A, 30.08.13 Initial manual release All

B, 03.12.13 Document remake All

C, 30.10.15 Fixed a number of errors All

7.2 BOARD REVISION

Remember to check the schematics and the board design files to compare the differences.

Revision Notable changes

A Initial release of the board

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8. WARRANTY AND SUPPORT

For product support, hardware information and error reports mail to: support@olimex.com. All document or hardware feedback is welcome. Note that we are primarily a hardware company and our software support is limited. Please consider reading the paragraph below about the warranty of Olimex products.

All goods are checked before they are sent out. In the unlikely event that goods are faulty, they must be returned, to OLIMEX at the address listed on your order invoice.

OLIMEX will not accept goods that have clearly been used more than the amount needed to

evaluate their functionality.

If the goods are found to be in working condition, and the lack of functionality is a result of

lack of knowledge on the customers part, no refund will be made, but the goods will be returned

to the user at their expense.

All returns must be authorized by an RMA Number. Email support@olimex.com for authorization

number before shipping back any merchandise. Please include your name, phone number and order

number in your email request.

Returns for any unaffected development board, programmer, tools, and cables permitted within 7

days from the date of receipt of merchandise. After such time, all sales are considered final.

Returns of incorrect ordered items are allowed subject to a 10% restocking fee. What is

unaffected? If you hooked it to power, you affected it. To be clear, this includes items that

have been soldered to, or have had their firmware changed. Because of the nature of the

products we deal with (prototyping electronic tools) we cannot allow returns of items that have

been programmed, powered up, or otherwise changed post shipment from our warehouse.

All returned merchandise must be in its original mint and clean condition. Returns on damaged,

scratched, programmed, burnt, or otherwise 'played with' merchandise will not be accepted.

All returns must include all the factory accessories which come with the item. This includes

any In-Circuit-Serial-Programming cables, anti-static packing, boxes, etc.

With your return, enclose your PO#. Also include a brief letter of explanation of why the

merchandise is being returned and state your request for either a refund or an exchange.

Include the authorization number on this letter, and on the outside of the shipping box.

Please note: It is your responsibility to ensure that returned goods reach us. Please use a

reliable form of shipping. If we do not receive your package we will not be held liable.

Shipping and handling charges are not refundable. We are not responsible for any shipping

charges of merchandise being returned to us or returning working items to you.

The full text might be found at https://www.olimex.com/wiki/GTC#Warranty for future reference.

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